George Clooney Starts Snowball Fight with Matt Damon

The star proved getting a movie done can be plenty of fun if you've got your friends with you – and you've got a late-season dumping of snow. Which is just what the conditions were Friday when he lobbed a snowball at the star of his wartime drama, The Monuments Men, Matt Damon.

Damon responded the only way he could: by whipping a snowball back at the director! Costar Cate Blanchett stayed out of the fray, and according to local tabloid B.Z., the production team cheered them on.

Clooney and Damon then got back to work filming a scene outside of Berlin. The film is based on the true story of an allied division of men and women trying to rescue the great works of art that Nazi troops were pillaging from the countries they conquered.